Refactor view modules for improved readability and consistency

- Updated markdown rendering logic to use more concise methods for obtaining vector lengths.
- Changed review status display to use the correct flag from settings.
- Cleaned up sidebar rendering code for better formatting and readability.
- Enhanced status bar rendering with improved string formatting and consistent style application.
- Refined workflow panel rendering, ensuring consistent style usage and improved readability.
- Added architecture overview and detailed documentation for backend, data, dependencies, and frontend structures.

src/app/review/mod.rs

@@ -76,7 +76,7 @@ pub fn should_trigger_review(state: &AppStateRest, origin: Origin) -> bool {
         return false;
     }
     let Some(runtime) = &state.session_runtime else { return false };
-    if !state.settings.review_enabled {
+    if !state.settings.flags.review_enabled {
         return false;
     }
     if runtime.edit_count > 0 && runtime.edit_count % 5 == 0 {